Re: Documenting GridFitTT

Index: doc/Language.htm
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RCS file: /cvs/ghostscript/gs/doc/Language.htm,v
retrieving revision 1.76
diff -u -r1.76 Language.htm
--- doc/Language.htm	22 Oct 2003 11:22:30 -0000	1.76
+++ doc/Language.htm	27 Oct 2003 10:21:05 -0000
@@ -1992,6 +1992,27 @@
 <b><tt>-dAlignToPixels</tt></b>.
 </dl>
 
+
+<dl>
+<dt><b><tt>GridFitTT &lt;integer&gt;</tt></b>
+<dd>Control the use of True Type grid fitting (hinting).
+Ghostscript implements a reduced True Type bytecode interpreter,
+which can interpret the subset of True Type glyph instructions  
+not covered by Apple's patent. This allows the Dynalab fonts to 
+rasterize properly.
+Fonts with patented instructions can't be properly grid-fitted.
+This parameter controls the action of the reduced interpreter:
+a value of 0 disables grid fitting for all fonts;
+a value of 1 enables the grid fitting for glyphs that don't involve 
+patented instructions.
+When set to 1 a warning is printed to stderr when a patented 
+instruction is encountered, and the glyph is rendered ignoring the 
+entire grid fitting program. This parameter defaults to 0, but this
+may be overridden on the command line with
+<b><tt>-dGridFitTT=1</tt></b>.
+</dl>
+
+
 <dl>
 <dt><b><tt>UseWTS &lt;boolean&gt;</tt></b>
 <dd>If <tt>true</tt>, and if AccurateScreens are specified (either as
Index: doc/Use.htm
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RCS file: /cvs/ghostscript/gs/doc/Use.htm,v
retrieving revision 1.91
diff -u -r1.91 Use.htm
--- doc/Use.htm	22 Oct 2003 16:39:28 -0000	1.91
+++ doc/Use.htm	27 Oct 2003 10:21:13 -0000
@@ -1823,6 +1823,24 @@
 </dl>
 
 <dl>
+<dt><b><tt>-dGridFitTT=</tt></b><em>n</em>
+<dd> This specifies the initial value for the implementation specific
+user parameter <b><tt>GridFitTT</tt></b>.
+Setting this to 1 enables grid fitting (hinting) for True Type glyphs 
+that don't involve patented instructions. The value 0 disables grid 
+fitting for all True Type fonts. The default value is 0.
+
+<p>
+Setting <b><tt>-dGridFitTT=1</tt></b> may improve rendering
+of True Type fonts. In particular, some fonts rely on the grid fitting 
+instructions for proper rasterization.
+Ghostscript only supports the freely-implementable subset of grid 
+fitting instructions. If a patented instruction is encountered, a 
+warning is printed to <tt>stderr</tt> and the glyph is rendered with no 
+grid fitting.
+</dl>
+
+<dl>
 <dt><b><tt>-dUseCIEColor</tt></b>
 <dd>Set UseCIEColor in the page device dictionary, remapping device-dependent 
 color values through a CIE color space. This can can improve conversion